202131311020 has 48 divisors (see below), whose sum is σ = 427499503200. Its totient is φ = 80277018624.

The previous prime is 202131310993. The next prime is 202131311021. The reversal of 202131311020 is 20113131202.

It is a junction number, because it is equal to n+sod(n) for n = 202131310985 and 202131311003.

It is not an unprimeable number, because it can be changed into a prime (202131311021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8054332 + ... + 8079388.

It is an arithmetic number, because the mean of its divisors is an integer number (8906239650).

Almost surely, 2^202131311020 is an apocalyptic number.

202131311020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202131311020 is an abundant number, since it is smaller than the sum of its proper divisors (225368192180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202131311020 is a wasteful number, since it uses less digits than its factorization.

202131311020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27922 (or 27920 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 202131311020 its reverse (20113131202), we get a palindrome (222244442222).

The spelling of 202131311020 in words is "two hundred two billion, one hundred thirty-one million, three hundred eleven thousand, twenty".